Improvement in cemented slate roofing



UNITED STATES- PATENT OFFICE.

AMZI G. HENNION, OF BUFFALO, NEW YORK.

IMPROVEMENT IN CEMENTED SLATE ROOFING.

Specification forming part of Letters Patent No. 141,437, dated August5, 1873; application filed May 3, 1873.

To all whom it may concern:

Be it known that I, AMZI G. HENNION, of Buffalo, in the county of Erieand State of New York, have.invented certain new Improvements inCemented Slate Roofing, of which the following is a specification:

This invention relates to a composition and preparation, to behereinafter described, to be combined with common slates for fiat roofs,or those with a slight pitch, whereby the roof is made hard like apavement and non-combustible. I

It is made and applied as follows: First, I take tarred paper or feltand lap it as in composition gravel roofing; then I put a heavy coat ofcomposition, made of tar and gypsum or ground stone, over the wholesurface of the paper, the same as if a complete cement roof were to bemade; I then take the ordinarysized slates, lay them on closely togetherwithout lapping, bed them solid in the composition, and point the jointsbetween each slate with a trowel, the same as in mason-work. Thiscements them all together, so that neither water nor any dampness canpenetrate through the interstices where the slates join. This makes, infact, a slate roof for flat houses, for which this composition orcombination is more particularly intended, and from which the slatescannot be displaced, making a permanent solid surface without theprobability of contracting, expanding, or cracking, representing afire-proof stone surface, which are the great and important advantagesof my invention, but which is also one of the simplest and cheapest, aswell as the most dura- Y covered with tiling; but such is not myinvention, nor is it claimed by me; but

I claim- A roofing, consisting of tarred paper or felt, tar, gypsum, orbroken stone, and slabs of slate, combined and applied substantially asset forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

. A. G. HENNION.

Witnesses:

J. R. DRAKE, J. M. SPIEs.

